Date: Fri, 12 Dec 2008 17:47:16 +0400 From: rihad <rihad@mail.ru> To: Danny Braniss <danny@cs.huji.ac.il> Cc: freebsd-hackers@freebsd.org Subject: Re: preventing FIFO from EOF Message-ID: <49426B64.1070004@mail.ru> In-Reply-To: <E1LB7zz-0006kU-SU@kabab.cs.huji.ac.il> References: <494235CA.2050101@mail.ru> <E1LB7zz-0006kU-SU@kabab.cs.huji.ac.il>
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Danny Braniss wrote: >> $ mkfifo /var/tmp/foo >> $ buffer -i /var/tmp/foo # misc/buffer >> # in another console: >> $ echo hi > /var/tmp/foo >> >> buffer prints hi and exits. I want it to keep reading and printing >> indefinitely. >> >> Further experimentation revealed that I need two writers: one dummy >> writer that just keeps /var/tmp/foo open for writing, and the other >> doing the "real work". This way buffer wouldn't exit. But how to emulate >> the dummy writer? It itself needs to block on something to keep >> /var/tmp/foo open. Any clean way to do this in shell? Maybe the solution >> is quite simple but isn't at the tip of my tongue. >> >> Thanks. > > too easy > n csh: > while 1 > buffer -i /var/tmp/foo > end > or in sh: > while true; do > buffer -i /var/tmp/foo > done > > Thanks, but I should have said that buffer must always run to never miss any data. The reason being that buffer's output gets fed into another program that shouldn't be restarted.
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